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Global Selections
CM Energy
B Physics and Light States
Heavy Ion
SM
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Higgs
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HDBS
SUSY
Exotics
Physics Modelling
Tracking
Egamma
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Tau
Jet/Etmiss
Flavour tagging
BSM Searches
(SUSY, HDBS, Exotics)




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Upgrade Studies
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Quick links: Papers Confnotes Pubnotes

Papers and publications
(Full list of ATLAS papers, List/RSS from CDS) Hide table

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Short Title Group Journal Reference Date √s (TeV) L Links
Conference (CONF) notes with preliminary results on data
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FlavourTaggingPublicResultsCollisionData

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Introduction

On this page you can find a section that collects the links to the Flavour Tagging ATLAS papers and CONF Notes, as well as collections of approved plots. Each CONF Note link points to a page where you can find:
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  • the eps and the png file for each plot that appears in the document.
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<!-- ***********************INCLUDE FILTER SECTION************************************* -->
Global Selections
CM Energy
Performance selections
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Date :   Filter by date:

Filtered results: [Papers Confnotes Pubnotes ]



 
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8 TeV Data

List of CONF Notes for 8 TeV Data

List of PUB Notes for 8 TeV Data

Approved Plots for 8 TeV Data

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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using the PDF method on ttbar dilepton sample. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4 at the electromagnetic scale and then calibrated to the hadronic scale.

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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using a tag and probe method based on kinematic selection on ttbar dilepton sample with two jets in the final state. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4, applying the local calibration scheme.

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ttbartopo.png

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using system8 method on muon-jet sample. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4 at the electromagnetic scale and then calibrated to the hadronic scale.

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system8.png

7 TeV Data

List of CONF Notes for 7 TeV Data

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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency (overall simulation efficiency integrated for jets with pT > 15GeV and |η| < 2.5), extrapolated from a sample of c jets containing D* mesons analyzed for the 2011 data to a sample of inclusive c jets. The scale factors are with respect to a Pythia6 simulation.

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Scale_pt_MV1-70.png

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency (overall simulation efficiency integrated for jets with pT > 15GeV and |η| < 2.5), obtained by combining the dijet-based pTrel and system8 analyses with the ttbar-based kinematic fit (l+jets) and kinematic selection (dilepton sample) analyses for 2011 data.

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comb2011.png

Soft muon tagging multiplicity per jet. Jets of pseudorapidity |eta| < 1.8 and ET> 20 GeV were selected. Stacked histogram: simulation. Markers: 7 TeV data.
The following cuts have been applied to these muons:

  • pt > 4 GeV
  • |d0| < 4 mm
  • DR(Jet,Muon) < 0.4

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ntagsperjet_n7.png
Transverse momentum of the soft muon tagging candidate. Stacked histogram: simulation. Markers: 7 TeV data.
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softmupt_n48.png
Delta R (in etaxphi) between the muon and the jet. Stacked histogram: simulation. Markers: 7 TeV data.
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dr_n57.png
Matching chi2/dof of the combined muons. Combined muons correspond to a track fully reconstructed in the muon spectrometer and matched with a track in the inner detector. In the work presented here, the muon spectrometer track is extrapolated to the interaction point and is statistically combined to the inner detector track. The matching chi2 corresponds to this statistical combination. Stacked histogram: simulation. Markers: 7 TeV data.
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stacomatchchi2_n13.png
Impact parameter of the candidates with regard to the primary vertex. Stacked histogram: simulation. Markers: 7 TeV data.
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d0_n55.png
Impact parameter significance of the candidates with regard to the primary vertex. Stacked histogram: simulation. Markers: 7 TeV data.
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d0sig_n56.png
Transverse momentum with regard to the jet axis (pTrel) of the soft muon tagging candidates. To compute pTrel, the jet momentum is corrected by adding the muon momentum to it. Stacked histogram: simulation. Markers: 7 TeV data.
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ptrel_n58.png
Soft muon tagger weight, i.e. likelihood ratio of the pTrel variable for b and light jets. Combined and low-pT muons are treated in separate likelihoods, hence the dip in the weight distribution between 2 and 2.5. The low-pT muons tend to have a smaller weight than the combined muons. Stacked histogram: simulation. Markers: 7 TeV data.
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softmuweight_n9.png
This jet has all the characteristics of a b-jet with a semi-leptonic decay (to a muon).

Vertex Taggers:
The jet is tagged by both the JetProb and the SV0 tagger, with Jet probability = 1E-9 and SV0 L/sigma(L)= +24

Muon Tagger:
A combined muon with a likelihood ratio of 4.6, with the following properties:

  • Muon pT = 6 GeV
  • Muon d0 = 610 microns
  • Muon d0/sigma(d0) = 15
  • The muon is part of the SV0 secondary vertex.

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display4349994d.png

900 GeV Data

List of CONF Notes for 900 GeV Data


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<!--For significant updates to the topic, consider adding your 'signature' (beneath this editing box)-->
Major updates:
-- JanStillings - 07-May-2010 -- ChristianWeiser - 11 Dec 2009 -- TomLeCompte - 12-Dec-2009

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Introduction

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  • the eps and the png file for each plot that appears in the CONF Note.
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8 TeV Data

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8 TeV Data

List of CONF Notes for 8 TeV Data

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Scale_pt_MV1-70.png

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency (overall simulation efficiency integrated for jets with pT > 15GeV and |η| < 2.5),

  obtained by combining the dijet-based pTrel and system8 analyses with the ttbar-based kinematic fit (l+jets) and kinematic selection (dilepton sample) analyses for 2011 data.
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List of CONF Notes for 7 TeV Data

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Approved Plots for 7 TeV Data

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Revision 312013-06-25 - FrankFilthaut

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8 TeV Data

 
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List of CONF Notes for 8 TeV Data

 

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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm

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7 TeV Data

List of CONF Notes for 7 TeV Data

 

Approved Plots for 7 TeV Data

Revision 302013-06-19 - FabrizioParodi

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  The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4, applying the local calibration scheme.
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Approved Plots for 8 TeV Data

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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using the PDF method on ttbar dilepton sample. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4 at the electromagnetic scale and then calibrated to the hadronic scale.

eps-file
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PDFdilep.png

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using a tag and probe method based on kinematic selection on ttbar dilepton sample with two jets in the final state. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4, applying the local calibration scheme.

eps-file
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ttbartopo.png

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70% efficiency on 8 TeV data, using system8 method on muon-jet sample. The jets are reconstructed from topological clusters using the anti-kt algorithm with a distance parameter of 0.4 at the electromagnetic scale and then calibrated to the hadronic scale.

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system8.png

 

Approved Plots for 7 TeV Data

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Revision 282013-03-02 - FrankFilthaut

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The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm

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  obtained by combining the dijet-based pTrel and system8 analyses with the ttbar-based kinematic fit (l+jets) and kinematic selection (dilepton sample) analyses for 2011 data.

Revision 272013-03-01 - FabrizioParodi

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Approved Plots for 7 TeV Data

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Contacts for these plots: Fabrizio Parodi, Frank Flthaut

The b-tag efficiency data-to-simulation scale factor for the MV1 tagging algorithm at 70\% efficiency (overall simulation efficiency integrated for jets with $p_T>15~GeV$ and $|\eta|<2.5$), obtained by combining the dijet-based pTrel and system8 analyses with the ttbar-based kinematic fit (l+jets) and kinematic selection (dilepton sample) analyses for 2011 data.

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Introduction

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On this page you can find a section that collects the links to the Flavour Tagging ATLAS CONF Notes, as well as the section that collects the approved plots.

Flavour Tagging ATLAS CONF Notes

Below is the list of the Flavour Tagging ATLAS CONF Notes. Each link points to a page where you can find:
>
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On this page you can find a section that collects the links to the Flavour Tagging ATLAS CONF Notes, as well as collections of approved plots.
Each CONF Note link points to a page where you can find:
 
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7 TeV Data

 

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900 GeV Data

 

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Revision 222012-03-29 - SaraStrandberg

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Approved Plots for 7 TeV Data

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  • __[[https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/CONFNOTES/ATLAS-CONF-2011-089/][Calibrating the b-Tag Efficiency and Mistag Rate in

Revision 202011-07-21 - ChristianWeiser

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Revision 182011-01-26 - PatrickJussel

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FlavourTaggingPublicResultsCollisionData

Revision 172010-12-20 - ChristianWeiser

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List of CONF Notes for 7 TeV Data

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Approved plots from 900 GeV Collision Data

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Approved for first LHC runs can be found here. For newest results, check above CONF notes.
 

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Approved Plots for 7 TeV Data

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List of CONF Notes for 7 TeV Data

 
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Approved Plots for 7 TeV Data

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Soft muon tagging multiplicity per jet. Jets of pseudorapidity |eta| < 1.8 and ET> 20 GeV were selected. Stacked histogram: simulation. Markers: 7 TeV data.
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Soft muon tagging multiplicity per jet. Jets of pseudorapidity |eta| < 1.8 and ET> 20 GeV were selected. Stacked histogram: simulation. Markers: 7 TeV data.
 The following cuts have been applied to these muons:
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Matching chi2/dof of the combined muons. Combined muons correspond to a track fully reconstructed in the muon spectrometer and matched with a track in the inner detector. In the work presented here, the muon spectrometer track is extrapolated to the interaction point and is statistically combined to the inner detector track. The matching chi2 corresponds to this statistical combination. Stacked histogram: simulation. Markers: 7 TeV data.
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Matching chi2/dof of the combined muons. Combined muons correspond to a track fully reconstructed in the muon spectrometer and matched with a track in the inner detector. In the work presented here, the muon spectrometer track is extrapolated to the interaction point and is statistically combined to the inner detector track. The matching chi2 corresponds to this statistical combination. Stacked histogram: simulation. Markers: 7 TeV data.
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Transverse momentum with regard to the jet axis (pTrel) of the soft muon tagging candidates. To compute pTrel, the jet momentum is corrected by adding the muon
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Soft muon tagger weight, i.e. likelihood ratio of the pTrel variable for b and light jets. Combined and low-pT muons are treated in separate likelihoods, hence the dip in the weight distribution between 2 and 2.5. The low-pT muons tend to have a smaller weight than the combined muons.
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 This jet has all the characteristics of a b-jet with a semi-leptonic decay (to a muon).

Vertex Taggers:

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The jet is tagged by both the JetProb and the SV0 tagger, with Jet probability = 1E-9 and SV0 L/sigma(L)= +24
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A combined muon with a likelihood ratio of 4.6, with the following properties:
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dr_n57.png
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Matching chi2/dof of the combined muons. Combined muons correspond to a track fully reconstructed in the muon spectrometer and matched with a track in the inner detector. In the work presented here, the muon spectrometer track is extrapolated to the interaction point and is statistically combined to the inner detector track. The matching chi2 corresponds to this statistical combination. Stacked histogram: simulation. Markers: 7 TeV data.
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stacomatchchi2_n13.png
Impact parameter of the candidates with regard to the primary vertex. Stacked histogram: simulation. Markers: 7 TeV data.
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Impact parameter significance of the candidates with regard to the primary vertex. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
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d0sig_n56.png
Transverse momentum with regard to the jet axis (pTrel) of the soft muon tagging candidates. To compute pTrel, the jet momentum is corrected by adding the muon momentum to it. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
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ptrel_n58.png
Soft muon tagger weight, i.e. likelihood ratio of the pTrel variable for b and light jets. Combined and low-pT muons are treated in separate likelihoods, hence the dip in the weight distribution between 2 and 2.5. The low-pT muons tend to have a smaller weight than the combined muons. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
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softmuweight_n9.png
This jet has all the characteristics of a b-jet with a semi-leptonic decay (to a muon).

Vertex Taggers:
The jet is tagged by both the JetProb and the SV0 tagger, with Jet probability = 1E-9 and SV0 L/sigma(L)= +24

Muon Tagger:
A combined muon with a likelihood ratio of 4.6, with the following properties: Muon pT = 6 GeV
Muon d0 = 610 microns
Muon d0/sigma(d0) = 15
The muon is part of the SV0 secondary vertex
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List of CONF Notes for 900 GeV Data

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Revision 112010-06-10 - Gwatts

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Approved Plots for 7 TeV Data

 
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Contacts for these plots: Christian Weiser, Gordon Watts

Soft muon tagging multiplicity per jet. Jets of pseudorapidity |eta| < 1.8 and ET> 20 GeV were selected. Stacked histogram: simulation. Markers: 7 TeV data.
The following cuts have been applied to these muons:
-pt > 4 GeV
-|d0| < 4mm
-DR(Jet,Muon)<0.4
eps-file
png-file

ntagsperjet_n7.png
Transverse momentum of the soft muon tagging candidate. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
softmupt_n48.png
Delta R (in etaxphi) between the muon and the jet. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
png-file
dr_n57.png
Matching chi2/dof of the combined muons. Combined muons correspond to a track fully reconstructed in the muon spectrometer and matched with a track in the inner detector. In the work presented here, the muon spectrometer track is extrapolated to the interaction point and is statistically combined to the inner detector track. The matching chi2 corresponds to this statistical combination. Stacked histogram: simulation. Markers: 7 TeV data.
eps-file
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dr_n57.png
 

List of CONF Notes for 900 GeV Data

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 Last reviewed by: Never reviewed

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META FILEATTACHMENT attachment="ntagsperjet_n7.png" attr="" comment="" date="1276158030" name="ntagsperjet_n7.png" path="ntagsperjet_n7.png" size="11673" stream="ntagsperjet_n7.png" tmpFilename="/usr/tmp/CGItemp17051" user="85f34992cd5fc6eea222" version="1"

Revision 102010-06-07 - ChristianWeiser

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List of CONF Notes

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List of CONF Notes for 7 TeV Data

List of CONF Notes for 900 GeV Data

 

Revision 92010-05-10 - PatrickJussel

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FlavourTaggingPublicResultsCollisionData

Revision 82010-05-07 - JanStillings

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Introduction

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* In this page you can find a section that collects the links to the Flavour Tagging ATLAS CONF Notes, as well as the section that collects the approved plots.
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On this page you can find a section that collects the links to the Flavour Tagging ATLAS CONF Notes, as well as the section that collects the approved plots.
 

Flavour Tagging ATLAS CONF Notes

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* Below the list of the Flavour Tagging ATLAS CONF Notes. Each links points to a page where you can find:
>
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Below is the list of the Flavour Tagging ATLAS CONF Notes. Each link points to a page where you can find:
 
  • the PDF file of the CONF Note;
  • the eps and the png file for each plot that appears in the CONF Note;
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Approved plots from 900 GeV Collision Data

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Approved plots from 900 GeV Collision Data

 
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Contacts for these plots: Christian Weiser, Gordon Watts

Distribution of the transverse impact parameter, computed with respect to the reconstructed event primary vertex after having excluded the track under consideration from the vertex fit.
The following track selection criteria have been applied:
-pt > 1 GeV
-|eta| < 2.0
-at least 1 hit in the first pixel layer (b-layer)
eps-file
gif-file

ImpactParameter_d0_pt1GeV.gif
Distribution of the transverse impact parameter, computed with respect to the reconstructed event primary vertex after having excluded the track under consideration from the vertex fit.
The following track selection criteria have been applied:
-pt > 3 GeV
-|eta| < 2.0
-at least 1 hit in the first pixel layer (b-layer)
eps-file
gif-file
ImpactParameter_d0_pt3GeV.gif

The resolution of the transverse impact parameter, computed with respect to the reconstructed event primary vertex after having excluded the track under consideration from the vertex fit, as a function of 1/p^2sin^3(theta). The resolution in each bin is obtained from the result of a Gaussian fit within +- 3 sigma. It includes the effect of the primary vertex resolution, which may be significant at low 1/p^2sin^3(theta)
The following track selection has been applied:
Pt > 0.5 GeV
|eta| < 1.2
# Silion hits > 5
# b-layer hits = 1
where the tight cut on eta restricts us to the barrel region since the parameterisation explicitly describes a cylindrical geometry.
The resolution increases with 1/p^2sin^3(theta) showing the effect of multiple scattering and the similar slopes in the data and MC suggest a good description of the material.
eps-file
gif-file

d0res.png
>
>
Approved for first LHC runs can be found here. For newest results, check above CONF notes.
 

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-- JanStillings - 07-May-2010
 -- ChristianWeiser - 11 Dec 2009 -- TomLeCompte - 12-Dec-2009
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META FILEATTACHMENT attachment="d0res.eps" attr="" comment="Impact Parameter Resolution (eps)" date="1261026614" name="d0res.eps" path="d0res.eps" size="13624" stream="d0res.eps" tmpFilename="/usr/tmp/CGItemp46565" user="85f34992cd5fc6eea222" version="1"
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Revision 72010-03-09 - ChristianWeiser

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List of CONF Notes

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Revision 62010-03-09 - ChristianWeiser

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This page contains public plots for collision data.
 
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Plots from 900 GeV Collision Data

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Introduction

* In this page you can find a section that collects the links to the Flavour Tagging ATLAS CONF Notes, as well as the section that collects the approved plots.

Flavour Tagging ATLAS CONF Notes

* Below the list of the Flavour Tagging ATLAS CONF Notes. Each links points to a page where you can find:
  • the PDF file of the CONF Note;
  • the eps and the png file for each plot that appears in the CONF Note;

List of CONF Notes


Approved plots from 900 GeV Collision Data

  Contacts for these plots: Christian Weiser, Gordon Watts

Revision 52009-12-17 - TomLeCompte

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Revision 42009-12-17 - Gwatts

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 Distribution of the transverse impact parameter, computed with respect to the reconstructed event primary vertex after having excluded the track under consideration from the vertex fit.
The following track selection criteria have been applied:
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 eps-file
gif-file
ImpactParameter_d0_pt3GeV.gif
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Added:
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The resolution of the transverse impact parameter, computed with respect to the reconstructed event primary vertex after having excluded the track under consideration from the vertex fit, as a function of 1/p^2sin^3(theta). The resolution in each bin is obtained from the result of a Gaussian fit within +- 3 sigma. It includes the effect of the primary vertex resolution, which may be significant at low 1/p^2sin^3(theta)
The following track selection has been applied:
Pt > 0.5 GeV
|eta| < 1.2
# Silion hits > 5
# b-layer hits = 1
where the tight cut on eta restricts us to the barrel region since the parameterisation explicitly describes a cylindrical geometry.
The resolution increases with 1/p^2sin^3(theta) showing the effect of multiple scattering and the similar slopes in the data and MC suggest a good description of the material.
eps-file
gif-file

d0res.png
 
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Revision 32009-12-14 - ChristianWeiser

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 -|eta| < 2.0
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Revision 22009-12-12 - TomLeCompte

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